iPod Touch doesn't Appear in iTunes

I had done a jailbreak on my iPod Touch, but it then stopped showing up on iTunes. I have tried uninstalling and re-installing iTunes and have reset the Touch several times, but it still does not show up on iTunes. Windows XP does acknowledge when I plugin the Touch. Does anyone have any suggestions? Thanks.

I have tried uninstalling and reinstalling Apple Mobility, Quicktime, and iTunes. and I have tried restoring the iPod Touch to factory firmware and still nothing. I have also tried different usb ports on my computer.

(Windows XP & iPod Touch both make their little noises when I plug it in)

There is a file that you move from one folder to another, at the beginning of the Jailbreak process. You need to put it back in its Original file, Its called iTunes something im sure. But you will know, as you would of moved it from the original file hen you started the Jailbreak.
Hope i helped